Self-priming positive displacement constant flow high capacity pump

Abstract

A rotary action, self-priming positive displacement constant flow high capacity fluid pump is described. None of the pump parts touch in the pump chamber to minimize pump wear allowing for extended pump life. Since there are no touching parts in the pump chamber, the pump can be operated dry without the pump liquid being present without damage to the pump. The pump may be operated either clockwise or counter-clockwise without loss of positive displacement or reduction in fluids input or output. Due to the design of the pump, the pump is inherently low-maintenance and is highly resistant to clogging by debris and the like. Fluid pressure relief sections are provided by carving out of the inside portions of the housing structure to which the ends of the shaft are mounted to vary or improved pump performance.

What is claimed is: 
     
       1. An improved rotary, self-priming, constant flow, high capacity, positive displacement pump for pumping fluids, comprising:
 a pump housing having a fluid inlet and a fluid outlet; 
 a first rotary impeller operably disposed in the pump housing, comprising a shaft including shaft ends rotatably mounted in the pump housing, the shaft including a plurality of vanes having contoured faces extending outwardly therefrom; 
 a second rotary impeller operably disposed in the pump housing, comprising a shaft including shaft ends rotatably mounted in the pump housing, the shaft including a plurality of vanes having contoured faces extending outwardly therefrom; 
 a pair of gears each secured to at least one of the ends of the shafts of the first and second rotary impellers, wherein the gears mesh with each other and synchronize rotation of the first and second rotary impellers to ensure that the vanes do not contact one another during rotation; and 
 a first side pressure release chamber disposed inside the pump chamber in the pump housing, the first side pressure release chamber operationally disposed at the sides of the vanes of the first impeller, wherein 
 each vane has an end, and a flexible seal is secured to the end of each vane. 
 
     
     
       2. An improved rotary, self-priming, constant flow, high capacity, positive displacement pump for pumping fluids, comprising:
 a pump housing having a fluid inlet and a fluid outlet; 
 a first rotary impeller operably disposed in the pump housing, comprising a shaft including shaft ends rotatably mounted in the pump housing, the shaft including a plurality of vanes having contoured faces extending outwardly therefrom; 
 a second rotary impeller operably disposed in the pump housing, comprising a shaft including shaft ends rotatably mounted in the pump housing the shaft including a plurality of vanes having contoured faces extending outwardly therefrom; 
 a pair of gears each secured to at least one of the ends of the shafts of the first and second rotary impellers, wherein the gears mesh with each other and synchronize rotation of the first and second rotary impellers to ensure the vanes do not contact one another during rotation; and 
 a first side pressure release chamber disposed inside the pump chamber in the pump housing, the first side pressure release chamber operationally disposed at the sides of the vanes of the first impeller, wherein 
 each vane has a complementary cut-out slot for clearance during rotation of the impellers during synchronous intermeshing of the vanes.